Attachment for emery-wheel dressers.



H. G. BUTCHER. ATTACHMENT FOR EMBBY WHEEL DRESSBRS.

APPLICATION FILED no. 3, was.

970,681 Patented Sept 20, 1910.

' HARRY e. BUTCHER, or URBANA, OHIO.

ATTACHMENT FOR EMERY-WHEEL DRESSERS.

Specification of Letters Patent.

Patented Sept. 20, 1910.

Application filed December 3, 1908. Serial No. 465,778.

To all whom it may concern:

State of Ohio, have invented certain new and useful Improvements inAttachments for Emery-Wheel Dressers, of which the following is aspecification, reference being had therein to the accompanying drawings.

*This invention relates to improvements in attachments for emery wheeldressers. These dressers, as their name implies, are used to renew thedressing surfaces of emery wheels when they have become worn, glazed orclogged by gathering particles from the metal they are used to polishand reduce. Their active surfaces are so renewed by these dressers,which by abrasion, being harder than the emery wheels, rub off the oldsurface and leave a fresh surface. But in addition to so wearing, theemery wheels are found to lose their concentricity and to become untrueor eccentric on their peripheries, due to wearing more in some placesthan others. This is particularly true with the very small emery wheelsused by dentists for polishing and grinding teeth and teeth fillings.

" The object of my invention is to provide an attachment for emery wheeldressers whereby the dressers can be utilized to true or renew theconcentricity of the emery wheels.

To this end my invention consists in a bracket slidably mounted on oradjustably connected with the body of the emery wheel dresser andadapted to project beyond the dresser and engage with or fit against anobject, fixed with relation to the emery wheel, preferably the shaft, sothat the dresser can be steadied or held in one position,as well asadvanced, from moment to moment, toward and against the surface of thewheel.

In the accompanying drawings forming a part of this specification, onwhich like reference figures indicate corresponding parts,

Figure 1 is a View of a dresser with my attachment applied, shown inconjunction with a dentists emery wheel for treating teeth and fillings;Fig. 2, a view of a dresser and my attachment in conjunction with adentists emery wheel for grinding teeth and plates before application tothe mouth;

Fig. 3, an enlarged View of the dresser attachment shown alone inperspective; and

Fig. 4, a view of another type of dresser from that shown in Figs. 1 and2, with my attachment ap lied thereto.

The numera 1 indicates a dentists emery wheel for use in the mouth,mounted on the usual shaft 2 carriedby the chuck 3 and flexible shaft 4rotatable at a high speed, and the numeral 5 designates an emery wheeldresser of an approved form now generally on the market, consisting of atube having a handle at one end and filled interiorly with a compositionindicated at 6, constituting the dresser proper, being abrasive and hardenou h to attack the emery wheel, though that 1tse1f is very hard, anddress or renew it as before stated. On such, or any other approved typeof dresser I mount my attachment, which comprises a body portionarranged to receive the dresser and having a projection adapted toengage a fixed object near the wheel which is being dressed. \Vhen adresser of the type above described is employed the body portion ispreferably arranged to permit of the longitudinal adjustment of thedresser relatively thereto and is provided with means for holding thesame in its adjusted position. I11 the present instance I have shown theattachment as consisting of a tube 7 fitted to slide on the dresser andhaving a slot 8 extending through the same for a portion of its lengthto render the tubular body compressible by the action of aclamping-screw 9 screwed into one of the lugs 10 and against the other.This constitutes a clamp for clamping the attachment to the dresser,either positively or with sufficient friction to hold the dresser inposition when placed against the wheel to be dressed. The attachmentfurther comprises a head 11 constituting a portion against which topress the hand; and also comprises an arm or projection 12 which extendsbeyond the dresser and is notched, as shown at 13, or otherwise adaptedto embrace or engage with an object fixed with relation to the wheel tobe dressed, say the shaft of the Wheel. By this means the attachmentwill hold the dresser in a fixed position when brought up to the wheel,and as the wheel is dressed off on the high places, the dresser isadvanced by overcoming the friction between it and the attachment, or byslacking the clamping-screw, so as to follow up, from time to time,against the wheel until the latter becomes true or concentric.

In Fig. 4 I have shown my attachment appliedto another type of dresser,wherein the dresser proper is made of a black diamond instead of acomposition, but otherwise there is no change over what is shown in theother figures.

WVhile my invention is applicable for use 1 in treating emery wheelsgenerally as the same are used in factories and machine shops,

I design it particularly for use by dentists, to enable them to true uptheiremery wheels, which are usually miniature or small. Practicedemonstrates that these little emery wheels lose their concentricityafter different periods of use and become practically useless when notnearly otherwise worn out. At present they are cast aside when in thiscondition. As these wheels are expensive and wear rapidly, it becomesmaterial to correct their want of trueness and thus extend the period oftheir usefulness until they are literally worn out and not merelynominally consumed. My invention has demonstrated in use its efliciencyfor this work. My invention is also intended for use in treating wheelsmade of carborundum orany other material, and in referring to it asadapted for use with emery Wheels, I

wish it to be understood that my invention is capable of use with anykind of an abrasive wheel.

I have herein shown and described the invention as comprising a tubularbody portion adapted to receive a dresser and to be held againstlongitudinal movement therein by friction, but it will be understoodthat this form of the invention is shown and described for the purposeof illustration only. I

- .The form of the body portion and the manner of securing it to thedresser are imma- 1 terial, but it is preferable that the connectionbetween the two parts should be such that the .dresser may be movedlongitudinally t0 the attachment without removing the arm fromthe'fixed'object by means of which the dresser is supported in itsproper relation to the abrasive wheel. This adjustability may structionshown and described, for obvious modifications will occur to a in theart.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent is 1. As an article of manufacture, anattachment for abrasive wheel dressers comprising a hollow body portionadapted to receive a dresser and having means to resist the longitudinalmovement of said dresser relatively thereto, said body portion alsohaving a hand cont-act near one end and a projection extending beyondtheother end, arranged substantially parallel with said body portion andadapted to engage a fixed object.

2. As an article of manufacture, an attachment for emery wheel dresserscomprising a tubular body or sleeve adapted to receive and grip adresser, having a hand-contact near one end and a projection at theother having a notch at its extremity to embrace a fixed object. n

3. As an article of manufacture, an attachment for emery wheel dresserscomprising a tubular body or sleeve slotted part person skilled way, aclamping-screw, and a projection extending beyond the body portion orsleeve and adapted to engage with a fixed ob ect.

with said lugs.

In testimony whereof, I affix mysignature in presence of two witnesses.

HARRY e. BUTGHER. Witnesses I I E. O. HAGAN, F. W. SoI-I ErnR.

4. As an article of manufacture, an at.-

